Yeah, my friend checked the list with the pre med adviser of courses he was planning to retake to replace his grades. Grade replacement can be your friend big time. Without grade replacement he has a 2.8-2.9, with it, he has a 3.3-3.4. The rate he is going at he might be graduating with a 3.6. I haven't done grade replacement and have a 3.3. I'm considering possibly retaking a non-science class for a retake since I might be graduating a term early. I'm on pace of graduating around a 3.45-3.5. An A in this so called course would by itself improve my gpa by probably at least 0.1 (It counted a lot credit wise and I did not do well at all).
So I would say it is important to make sure it is equal to the credit hours. I think if it is greater than I probably would check with your school adviser or call AACOMAS